1. I like your list, except that I would not restrict the physics to just mathematical physics. I do understand why you put economics up there, and in fact I would much rather study economics than psychology.

2 and 3. These parts are linked, in fact almost the same thing. The course that will bring you the greatest instrumental rationality really depends what you intend to do with it, which is presumably linked to what interests you. In general, you, or someone who knows you personally, would generally be better at answering this for you than very rational people who only know you online. Given what you mentioned in the section between parts 3 and 4, pharmacology, maybe with a side of statistics, is probably a good call. (as for whether to study Bayesian or frequentist statistics, I'd say both. Frequestist methods can be useful in some circumstances if you remember to think like a Baysian while you use them.)